Aftermarket Sensors No Good?

[mattison]

After spending $1000 to have my PCM changed at the dealer (99 GMC Suburban 5.7 4wd) my truck still misfires. I took it back to them and said it runs just as bad as before I had the new computer. Now they say it's because I am using aftermarket O2 sensors (Bosch). Could this be possible? It doesn't make sense to me.

[Pilot12]

After spending $1000 to have my PCM changed at the dealer (99 GMC Suburban 5.7 4wd) my truck still misfires. I took it back to them and said it runs just as bad as before I had the new computer. Now they say it's because I am using aftermarket O2 sensors (Bosch). Could this be possible? It doesn't make sense to me.

Did ya ask why they didn't mention that before they sold ya a thousand dollar repair?? I'd be pissed.

[thearborbarber]

I'm calling BS on your dealer on this one. I have used and still use Bosch O2's in several vehicles with success. Plus bosch is the oem supplier for a lot of makes and models.

[68haywagon]

I used bosch in everything that I have replaced 02s from a 93 1500 to my grandfathers 2000 cavalier. Never any problems.

 

Mike